Lathe



' l N. F; FRETTER LATHE 4 sheets-Sheet 1 -Filed Feb. l0

July 31, 1923. A

N. F. FRETTER LATIE Filed Feb. 1o, 1919 4 sheets-Sheet 2 fnl/Enfan- /y j 1 f" @2422@ v ,MQV, am

July 3i, 1923. 1,463,505

l N. F. FRETTER u mmmV Filed F l0, 1919 4 Shame-Sheet 3 7 ./'nyeizfn M11/wiz fvfvreem @mm SMDMMWAM 'f E.

July 311, i923. Y

N. F. FRETTER LATHE Filed Feb. 1o 1919 4 sheets-shag@ 4 July 31, 1923..I

epica NATHAN F. FRETTER, F CLEVELAND, 0R10.

y Laren.

application med February T o all whom t my-concern.:

Be it known that I, NATHAN'F. FRETTER,

a citizen of the United States, residing at panying drawings.

This invention relates to lathes of the same general character as those disclosed in my copending applications Serial Nos. 186,859

and. 229,896, filed respectively August 18, 1917, and April 22, 1918.

The general objects of my present inven- J tion are to provide a substantial and durable means for machine of the aforesaid character that is adapted to the handlingl of various kinds of work; that is very convenient of use; Whereonsuccessive operations may be performed upon an article without the attention of the operator further than to insert the unfinished or crude article in the machine and remove the finished or completed piece of work therefrom; and whereinv all working parts are leasily accessible.

My present machine is distinguished from its predecessors essentially by the employment of a pluralit of tools (as a pairl of opposed taps or dri ls) at certain ones of the several stations, and by operating these tools froma common centrally actuating element. A further aim of myinvention is to provide moving the. work into contact with one of the opposed tools, said tool being stationary as to longitudinal movement, whileprojecting the other tool-toward and into contact with the work, the relative speeds of the moving parts being such as to cause the opposed tools to progress upon the work uniformly.

A further ob'ect is to provide in a' machine of this c aracter an adjustment between a. tool and its actuating element for the purpose of accommodating tools of dif ferent sizes, or for taking up the wear of the tool, or to compensate for irregularities or inaccuracies in the actuating element.

A further object is to rovide a work holder which may be locke in a fixed position at certain stations so that/active tools may operate upon the work; while, at another station, the holder is automatically unlocked and rotated while the work lis sub-l jectedA to the action of passive tools.

1c, '1919. serial no. 275,992.

Further and more general objects are to obtain the maximum of efficiency while adhering to simplicity of design and construction. Y

To these ends my invention may be defined as consisting of the combinations of elements set forth in the claims annexed hereto and illustrated in the accompanying drawings forming a part hereof and wherein Fig. 1 is a plan view of my improvedy lathe;l Fig. 2 is a transverse, vertical section through the machine substantially on the -line 2-2 of Fig. 1; Fig. 3 is a View similar to Fig.2 but in a. plane at right angles thereto, as indicated by the. line 3--3 of Fig. 1; Fig-4 is a horizontal section on the line 4-4 of Fig. 3; Fig. 5 is an elevational detail taken from the right hand side of the machine as viewed in Figs. 1 and 4; Fig. 6 is a sectional detail through the turret and adjoining parts at station D, the same being an enlargement of the parts occurring at the right hand side of F ig. 2; Fig. 7 is an elevation of the parts shown in F 1 6; as though viewed from the-right; an Fig. 8 is a plan view 0f a work holder andv associated parts.

For convenience of description' 1 shall refer to the locations of the, several sets of tools, as they progress clockwise about the machine, as'stations B, C, and D; and where the Work is introduced into land removed fromthe machine, l shall term ,station A.

The housing 1 of the 'machine is shown .as of semi-cylindrical form forwardly of its transversecenter, and as of rectangular form tolthe rear thereof (see Fig. 4) vwhile it terminates at its .lower end in a base flange and at its upper .end 4in la circular upwardly opening channel 2 within which a rmgturret 3 is adapted to rotate. The turret rides upon horizontally disposed rollers that are carried by pins '5 which have their ends supported within' the dside {ianges of the channel 2. Vertically disposed rollers are nel to receive the lateral pressure of the turret. l,The periphery ofthe turret is shown as provided with gear teeth 7 which are ar ran-ged to mesh with a driving gear, as I' shall presentl explain. A s many sets of rollers 4 may. e distributed about the channel 2 as are deemed necessary to properly support the turret.

Workholders are situated at suitable die tances apart about the turret (in the present instance the work holders being spaced 90 from each other). At each of these points (or wherever itmay be desired to locate a work holder) the upper face of the turret isgrooved radially, as indicated at 10,;particu'larly in Figs. 7 and 8, and along each I side of the groove, and contained therewith- Vim in, is a rail 11 that is held in-place by screws 12. The' opposed edges of the rails 11 are undercut to provide a dovetail channel (or y its equivalent) and afblock 14, complemen- V it tarily formed at its lower end, is slidably sup orted within the groove. rlhe block .is hel .against undue outward movement by stops 15 that are shown as secured to the turret by screws' 16, the turret and block being recessed so that whenthe stops occupy the recesses, their outer surfaces are Hush with thecorresponding surfaces oil the turret and block. l

18 is a driving member or gear having a central stud 19 which is ournaled within a bore '26 of the block 14, the stud being shown as integral with the gear andas having a circumferential 'roove' 21 which receives Aa screw or pin22 t throughl the block' and serves to retain the studl against withdrawal from the bore.

A work holder surmounts each of the gears 18 and the same is in the nature of a vise, the bed 25 whereof is secured to the gear by a screw 126 havin a notched head 27 that .reposes atthe midle of a dovetail channel 28 formed inthe topsurface of the bed "llhe bed may be securedv against with respect to the gear by dowel By reason of the fact that the threads which .ig and closing the occupy the opposite end portions of the screware reversely inclined, the jaws will be moved in opposite directions when the screw is turned, as by the application of a suit-v able handle-34 (Fig. 7 to the squd end 35 of the screw. The andle 34 1s retained by the operator for. use upon a work holder when at station A' for the purpose of openjaws to remove a ished article and ir'tI a @fresh bl'nk.

lachhar- 18- is rm held a 1 t tg "ma locking bolt 36 (Fi is'reciprocable .within abore 37 o theA block 14,the bolt being elled upwardl by a sprin 38 thatis n. ned between t e bottom o an enlargement or .the bore and a collar 39 on the bolt therebyto insert the up? at is driven transverselyA innesca per end of 'the bolt into a recess 40 of the gear. The lower end4 ofwthe bolt 36 is pro vided with an eye 41 which receives the up-l per laterally directed end 42 of a rod 43. 'lhe rod 43 is connected at its lower end lto `the outer end of a lever 44 that is pivoted lat 45 to a part of the turret. The inner end of the'lever 44 is: equipped with a roller 46 which traverses the upper edge of the inner wall of the channel 2. 'lhe foregoing parts are shown in Fig. 6 in the positions they occupy when the work Aholder is-at station D; and here the roller .46 rides upon a rcam 47 carried by the inner wall of the channel 2, so that at this station the innerV end of the lever is elevated by the cam to depress its opposite end and draw downward the rod 43 and consequently the bolt 36 to disengagc vit 'from recess 40 of the gear 18 and unlock the gear, for aj purpose which will presently be explained.

'lhe main driving shaft of the machine is designated 50 and is shown as journaledv at its right hand end (as viewed in, Fig. 4) in a boss 51 of the housing 1, and at its other end, ina bearing 52 that is inserted through a comparatively large opening 53 in the left hand wall of the housing and which has a. i

flange 54. that may `be 'bolted or similarly connected to the wall. '.lhemachine may be driven from any suitable source ofpower,

and the power may be introduced through a 'pulley 50a secured to shaft 5 0 adjacent the bearing 52. rllhe shaft 50 is supported inter.

mediate its ends within spaced bearings 55 which are shown as integral parts of a worin l wheel casing 5,6 that is supported centrally of the casing through integral arms 57. Between the bearings 55,v a wprm 58 is secured to the shaft 50 and 'the worm meshes with a`worm wheel 60 within thecasing 56 56, and within a bearing sleeve 63 of a beam 64 which extends across the upper end of the housing 1..

A. cam shaft 66 is supported transversely of the housing 1, in the vertical.l plane of the shaft 61, in suitable bearings,67, 68 and 68 that are applied respectively to the left andl right hand sides of the-housing.; I:The cam shaft 66 is drlven from the vertical shaft 61 through miter gears 69.

Supported in suitable brackets 7 0 (Fig. 4) which extend from the rear wall of the housmg 1 isa shaft 71 that is driven through lnterm spectively, to shafts` 71 and 50 beyond the right hand side of the housing. At the left hand end of the shaft 71 a gear 74 is carried by asleeve 75 that rides freely upon the shaft 7.1and within the left hand bracket 7 0 and has xed to its right hand end a clutch member 76 whichl is adapted to. be caged 'i 1.-: gears 72 and 73, secured, re

iat

b a Sliding durch member 77, splined to the s aft 71. The gear 74 meshes with a similar upper end of the shaft carrying a gear 81.

. which meshes with the gear teeth 7 of the turret 3. It follows from this that when the .v machine is in operation, and the clutch members 76 and 77 are engaged through mechamsm which I shall presently describe, that f the vertical shaft 79 would be rotated to impart motion to the turret. This is caused to occur at intervals as I shall now explain.

lThe cam drum `82 is splined to the cam shaft 66 to the right of gears 69 (as viewed in F ig. 2) and a roller 83 on the end of a lever 84, is caused to bear laterally against the cam 85 of the drum through the action of a Weight 86 connected to the lever by a flexible member guided over a pulley 87. Thelever 84 is pivoted to a bracket 88 that projects inwardly from the right hand wall of the housing and the lever extends rearwardly through la slot in the back wall of the housing where it terminates in a fork 8.9 that engages within the groove of the clutch member 77. The parts are.so timed that upon each rotation of the vertical shaft 61, the clutch comprising the members 76 and 77 .will be rendered effective to rotate the turs earn 85 so that the turret will remain at lindrical and is slidable within an aperturein the bottom wall of channel- 2. The locking bolt in the present instance is situated at station D. The lower end of rod 92 is vguided within'an aperture of a lug 94 of the housing and is equipped with a roller 95 which bears upon a cam 96 on theV cam vshaft c 66. Just before 'the turret is moved, the cam`96 permits the rod and consequently the lockin bolt-to drop, thereby'to disengage the bo t from one of the recesses 97 of the turret so that, upon the engagement of the` clutch members 76 and 77, the turret will be free to rotate. Before the tui-ret reaches its next restiposition the cam'96 elevates the rod 92 to frictionally engage the shoe 91 with the turret, thereby to retard the turrets movement. In the meantime, the locking bolt is depressed against the action of spring 93 y and when a recess 97 is brought int'o register with the bolt, the bo'lt-is projected into .the recess by thespring to lock the turret.

Situated at stations B, C and D are tools which are caused to o crate upon the work by cams carried by t evupper end of the central vertical shaft 61, the cams bein keyed or otherwise secured to the shaft and confined between a collar 100 thereon, anda nut 101 applied to the threaded upper end of the shaft.

At station B brackets 103 and 104 are secured to and rise from the outer and inner sides, respectively, of channel 2. These brackets terminate at their up er ends in l horizontal bearings within which the respective spindles 105 and 106 are journaled. The bearing of bracket 104 is cut awa intermediate its ends to provide space or a pulley, the pulley being splined to the spindle so as to permit longitudinal movement of the spindle independently of the pulley. A

cone pulley 107 is shown las secured to the outer end of the-s indle 105. Sustained sub- 108 that is secured to the side Wall of the,

housing 1 below the bracket 103, is a shfft 109 that is driven from the driving shaft 50 througl gears 110 and 111 that are secured respectivelyk'to the shafts 50 and 109, the inner end of the shaft being supported within a bearing socket in casing 56. A cone pulley 112 is situated on shaft 109 in the plane of the former cone pulley 107'that is carried by .spindles and ay pulley 113 on the inner end of shaft 109 is in the plane of the pulley on spindle 106. Belts 115 and 116 are trained over the pulleys associated with the respective spindles 105 and 106. A cam 118 secured to the vertical shaft 61, serves to advance spindle 106 toward the work sustained by the work holder at station B j and welghts 119 tend to retract the spindle in opposition to the cam by reason of their connection. with the spindle through flexible elements 120 that are guided over sheaves 121 on opposite sides of the bearing of bracket 104, and which iexib'le elements have theirforward ends attached to a member 122 that is swiveled to the spindle in any suitable manner. A tool, as in the present instance a drill 123, may b e connected in ,the customary manner to each of the spindles 105Gand 106." Under certain circumstances it may be found desirable or necessary to drive the opposed spindles 105 and 106 at different speeds, or to change the speed from time to. time. I have provided for this by lncludlng the cone pulleys 107 and 112i previously re.- ferred to, and it is obvious that the inner set of ulleys over which belt 116 is engaged mi(g t be of the same type. I

uided through a bore of bracket 104 is a plunger 125 which carries a roller 126 at-its rear end,l the same engaging a cam 127 u on shaft 61. A spring 128, contained wit 1n the bore through which the plunger passes :is notched to provide a hook which isar ranged to be engaged by clips 130 attached to. the rear faces oi blocks 1t of the work holders. lt may be explained that as a work i holder moves from station A to station B, a roller 131 that is 'setinto the outer tace 'of the block 141 (Fig..6), enga es-a stationary cam 132, shown (in Fig. 1 as carried by the outer Hangs or wall of the channel v 2 and extending upwardly and over the turret,

thereby to shiftthe work hold'er to the lextreme limit of its inward movement so as to bring theiclip 130 into register with the hooked end of the plunger 125 when the work holder arrives at station B.

1t will be understood from the'foregoing that as long as the machine is in operation, the spindles and 106, and consequently the drills 123, are being constantly rotated, as is'also shalt 61. rl`he parts are so timed and the cams 118 and 127 are so shaped, as to cause spindle 106 to be advanced at half the speed of plunger 125. Consequently, the worlrvl holder will be shifted outwardly to engage the work with the outer drill and feed it thereon at substantially the same speed that the inner drill is inserted into the work; and as the lspindle 106 and plunger ride from the high points of their respective cams, the weights 119 and the spring 128 will retractthem to their normal positions, the plunger returning the work holder to its former position at the inner side oi the turret. Thus the first operation is vperformed upon the worh at station B.

At stations C. (Figs. 1 xand 3) the holes bored at station'B may be threaded/by op.4 posed tapslwhich are supported and operatee in the same ener-al manner as the drills at sta/tion B. rachets and'136 rise trom the outer and inner sides, respectively, oi channel 2 and within their respective bearings 137 and138 are journaled spindles 139 and 1410. Spindle 1426 is -reciprocable within its bearing, and weightsl 141 tend to retract the spindle, lthe Aweights being connected 'thereto'by means of dexible elements 142 thatare guidedover sheaves 1413, carried on -opposite sides of the bearing 138,/the elel ments having their ends connected, through a member 14d, with thefront end oiE .the

spindle. 'llhe spindles carry "taps 1415.. pusher '116 is slidable within a guidewa in the braehegt 136 and its upwardly eaten ing inner end is arranged-to engagegthe rear en of spindle 140. An antitriction rollerll is carried by an extension of the pusher and en ages a cam150. v shown c early in Figs. 3 and 4l, a shaft- 152 entends hrough the rear wall of the.

inenten housingl and yis journaled in suitable bearings 153. A bevel gear 155 is secured to the forward end of the shaft 152 and meshes oontively. Between these gears, va clutch element is splinedto shaft 50 and is adapt-I v ed to be shifted into engagement with one or the other of the clutch members by a fork 161-,` which engages within the groove of the ,clutch element 160'aud is pivoted to a bracket 162. I'llhe forward end of the foi-k has an anti-friction roller 163 which traverses a groove 164: in a drum cam 165 that is fastened to the cam shaft 66. A pulley 168 is fixed to the rear end of shatt152 in the plane of a pulley on the outer end oilspindle 139.'

A belt 170 is engaged about those pulleys so f as to transmit motion' from the shaft 152 to the spindle 139. Shaft 152 carries a second pulley that is located just to the rear of gear 155, and a belt 171 transmits motion from this pulley to a pulley 172 on a short shaft 173 that is journaled in a boss at the lower end' of bracket 136. A pulley 175 is carried by the forward end of shaft 173 inthe plane of a pulley splined to spindle 1410, the bearing 138 being cut away to accommodate' the latter pulley; and a belt 176 transmits uro-v tion to the last'mentioned pulley frompulley` 175.' 'llhus it will b e-seen that the tap spindles are driven from shaft 152;` andthat shaft 152 sfrotated first in one direction and then the other through theinstrumentality o1? the shittable clutch member 160'which connects rst one and then the other of the bevel gears 156 and 157 to shaft '50, the clutch being actuated bythe fork is roched by the cam 165.

i The work holder arrives at station C at the inneifside of the turret and the cam 150 4acts topi-eject the inner tap, into the-corresponding bore ot the work. 'lherc'am' 150 is so shaped, however, as to advance the tap substantiallyrtwice as tast as `the tapcuts into the work `(assurriing that b'oth taps 14:5 have 'acts to shift the clutch member 160 and reverse the rotationhof the tap spindles, the innerv ltap gradually withdrawingtfrom theworh and atu the same time removing the d worlr from the oute tap,the linal result'being that theparts el left in the positions which they occupied at they start ot the operation.

' Plhe turret now moves a further oneion quarter rotation to carry the wort'. to station D,- thework holder engagingcam 180 as it approaches said station, thereby to be moved to the extreme outer side of the turret. As the work holder arrives at this station, the roller 46;; (Fig. 6) on the arm 44 overrides cam 47 to rock the arm in a dii'ectionto draw downward rod 43 and plunger 36, thus ret-racting the plunger and disengaging its upper end fromv recess 40 of gear 18. The gear is now free to rotate.

y Upon its arrival at station D, gear 18 moves into mesh with a gear 181 on the upper end of a -vertical shaft 182 that is supported in brackets 183 and 184. Below the latter bracket the shaft 182 has secured to it a clutch element 185 which is adapted to be engaged by a clutch element 186 having a hub 187 that is vertically reciprocable within a bearing aperture in a support 188. The hub 187 rides upon a cam 189 that is fastened to' shaft 66, and the lower end of shaft 182 is piloted in a socket of the hub. The clutchelement 186 incorporates a pulley over which a belt 190 is directed from a ulley 194 on shaft 71 (Figs.'2, I4 and 5).

he cam 189 is designed to engage the clutch elements 185 and 186 immediately after the arrival of the work holder at station D and to prolong such engagement during the time that the tools operate upon the work at this point.

'At station D I have elected to show groups of tools disposed at right angles-to which rises from the inner flange of'chanflexible elements 199 with the slide, said elements being guided over the sheaves 200. The slide is -made up of tworelatively adjustable sections having ears 201 through which the reversely threaded opposite ends of a screw 202 operates. Thus by turning the lscrew the effective length of the com# posite slide may be altered. The slide carries a roller 204 at its inner end which engages a cam 205 on shaft 61. This cam acts to force the vtools 195 into -`the work as the latter rotates. .Through the adjustment of the composite slide above described, tools of various lengths may be used; the depth of cut regulated; irregularities in the cam 205 compensated for; and the Wear of the tools taken up.

I shall now describe what have referred to above as the vertical tools. 210 is ya bracket which rises from the out/er side of the machine and overhangs the work holder at station D. This bracket terminates at its innerl end in a Vertical boss 211 within whichl a tool spindle or carrier 212 is guided. The spindle is splined to the boss so as to be held against rotation with rel spect thereto but is capable of vertical movement. The limit `of its downward movement is determined bythe adjustment of` the stop nut 213. A weight 214, applied to the upper end of the spindle, tends to depress the tools and drive theminto the workas the work is rotated. When the boring 'or cutting operation is completed, the tools are retracted through the elevation of the spindle by means of a rocker arm 215 which is forked at its inner end to embrace a grooved collar 216 lon the spindle, the outer Iend of the arm having connection through ya link 2 17 with a loop or stirrup 218 which encircles a cam 219 on the cam shaft 66. As the cam rotates it depresses the loop and draws downward the link to rock the arm 215. clamped within the holder 221, onthe lower end of the spindle, either concentric or` eccentric, With respect to the spindle, or parallel or at an angle thereto, for producingdiferent effects upon the work.

uringv the remaining one-quarter turn of the turret, the work holder isl carried to station A where it is held forward on the turret by a stationary cam 225. Here thel operator may apply handle 34 to screw 32 to relax the jaws of the work holder and remove the finished article, after which he may insert a fresh blank before the Work holder moves on to station B.

While the machine may rest with its base flange directly on the floor, l prefer to mount the machine upon a bed 226. This bed includesv a platform section 227 of the same general outline as the base flange and to which said flange Eis fastened by cap` screws 228. A trou;gh7229V inclines downwardly from the front 4of the bed about the platform section, and, at the rear right hand .corner of the bed (as viewed in Figs. 1 and 4), deepens into a basin 230 (see Figs. 2 and 3). According to the usual practice` conducted to the various tools by tubes properly arranged for the purpose, the lsame `being omitted from the drawings for the 'sake of clearness; and in such a case the oil or solution drips oil' into trough 229 and drains into basin 230. A suitable pump (not shown) may draw the oil or solution from the basin and circulate it through the tubes above mentioned.

It will be observed upon referring to Fig. 1 that a vseries of grooves or channels 10 The tools, designated 220, may beA wa lubricating oil or cooling solution may be are provided in addition to the tour-that are occupied by work holders in the present disclosure. 'By the particular'arrangement herein shown, six .work holders;D equally spaced about the turret, may be used inl place of the present tour.. ln such an event additional tools are also "provided, thesame being spaced sixty degrees apart, rather than ninety degrees as in the present inl stance. Upon referring to lFi 4 it will be seen that the wall of the housing 1 has iinished surfaces 240 for the application of brackets for carrying these additional# tools; and these tools may be operated from some moving part ot themachine as, for example',

shifted to the left' alonglshaft 66 from its present osition so that the cam portion 85 is cause to bein contact with the roller 83 of arm 84 fora shorter period of time than otherwise, tor it will be recalled that the tur- 3@ ret is moved by 'reason of and during .the

enga ment of the clutch members 76 and 77. he cam drum is shifted by means ot a fork 242 which-engages within a groove,

ot the -drum and has a lateral extension'243 S5 that is slidable within a guideway of the 5 either ot its positions.

` housing; This guidewa extends through a boss 244 and beyond w ich the fork extension is provided with -a handle 245 b' means of which it may be shifted. 'lhe iork ex- 4@ tension has a series of holesV 246 which are adapted vto be brou ht into register with a hole in the boss, an a suitable pin 247 may then be inserted through the aligning holes of the boss and fork to lock the latter in 'lo allow` torl the variable throw of the fork lever 84, which results from the shitting of the cam drum,

.while the movement of the clutch element 77 remains the same, l pivot the fork proper 5@ T89 vto the lever 84 and maintain them normally in alignment by a sprin 250.

While l have Ydesignated oly two alternative arrangements providing respectivel for tour' and six work holders, and have own means for attaching only two extra sets of toolsto the machine, and have pro- 'vided for only two positions ofthe drum upon shaft 66, it will be understood that it is illustrative v,only ot `the wide adaptability of the machine and `that it 'is within ,the spirit of my inventionto maire proon tor an desired number of work holders and their tools togetherv with appropriete adjustments for altering the `2 so that the rack ma side'if not needed. As t e turret rotates, the

means tor supporting a accende otherwise taken u by' cs.

lin some uses o the machine it might be found necessary or desirable to rotate the work, through something less than 360' between certain ones of the stations, and to provide for such an exigency l include a rack 255 that is situated, in the resent showing, between stations B and C, t e rack being hinged at 256 to a part projectin .upward from the outer dange of the channe be thrown to one gears 18 of the workholders enga e the raclr carrying thev work will be freed tor rotation.

lF rom this description, it'will be seen that my machine isp capable of performing numerous kinds of operations on various sorts ot articles b converting the machine slightly to meet te re uirements of the diderent pieces of work, t e principle and mode of operation ot the machine remaining the same under all circumstances.

Having thus described my invention, what ll claim 1s:-

Jl. ln a machine of the character setv forth, the combinationl of opposed tool carriers, means tor supporting a piece ot work between and in operative relation to tools supported byvsaid carriers, and furthermeans tor advancing the work into contact with one t'ool while moving the other tool into engagement with the work.

2. ln a machine ot the character set forth,

the combination of opposed `tcol carriers,

ieee ot work between and in operative re ation to toolssuport-.ed by said carriers, and furtherv means or advancing the work into contact with and withdrawing it from one tool while moving the other toolinto engagement with and retractingit from the work.

and are rotated so as to present t e work to .l

, 3. ln a machine ott/he character set "forth,

the combination of opposed tool carriers, means for supporting a piece ot work between and in operative relation to tools supported by said carriers, and means ai vancing one ot the tools into engagement mtl..

with `the work and for moving the work `through the intervention of s a1d tool into contact with the other tool. Q 'I 4. In a machine of the character set' forth, the combination of opposed taps, means for supporting a piece of work between and in operative relation to the taps, mechanism for driving the taps first in one direction and then the other, and means for advancing one ofthe taps into engagement with the work and for moving the work through the intervention of said tap into contact'with the other tap. A

5. In a machine of the character described, the combination of opposed taps, means for driving said taps lirst in one direction and then the other, means for supporting a piece of, work between and in operative relation to the taps, and mechanism for moving one tap toward and from the other whereby the movable tap is caused to engage and operate upon the work and. at the same time move the work into contact with the other tap.

6. In a machine of the character set forth, the combination of opposed tool carriers, a work holder sustained between and in operative relation to tools supported by said carriers, means for engaging the work holder and moving it so as to present the work to one tool, and means for moving the other tool carrier to cause its respective tool to overtake'the work and operate' upon the same.

7. In a machine of the character set forth, the combination of opposed tool carriers, a

. holder supporting a lplece of work between and in operative relation to tools supported by the carriers, means for shifting the holder to'engage the work with and remove it from one tool, and means for' simultaneouslyv moving the other tool into contact vith the work and withdrawing it thererom.

8. In a machine ofthe character set forth,

the work holder between the opposed tools,4 va plunger, the Work holder and plunger l having parts that are adapted to interlock as the work holder arrives between the tools} means for actuating the plunger to shift .the work holder in a direction ,to present the work to one tool, means for advancing the other tool towardmand into engagement with the work, and retracting'meansfor the last mentioned tool and plunger.

9. In a machine of the character set forth, the combination of opposed tools, means for'driving the tools, a holder for supporting-a piecev of work between and in opera-` tive relation to the tools, means for moving the holder to present the work to one .tool,'

means for simultaneously moving the other tool into engagement with the work, 'the driving means of one of the tools being of variable speed.

10. In a machine of the character set.. forth, the combination of a turret supported for rotation, work holders carried by the turret, an actuating member situated at the axis vof the turret, a support between .the turret and actuating member, a tool spindle reciprocable within-the support radially of l the turret, a slide guided within said support andhaving a portion disposed beyond the inner end of the spindle, and means for adjusting the distance between the spindle and said portion of theslide, the slidehavling a portion for cooperation with the actudering said means inedective thereby to unlock the work holder as the work is presented tothe tool, mechanism for arresting the movement of the carrier when the aforesaid driving members are in cooperation, and means for operating 'the second driving Amember when the carrier is at rest.

12. In a machine Yof the character setforth, the combination of a turret, work holders rotatably supported by the turret, tools situated at stations spaced about thecourse of the turret, means for moving the turret intermittently to present the work holders successively to the stations, each work holder involving a driving member, and a movable track located between theadjacent stations and adapted to be placed sof in a position wherein the driving member of each work holder willv cooperate with the. track aslthe work holder is carried -past the same.

13. In a machine of the character set forth, the combination of a turret, work holders rotatably supported by the turret, al stationary tool, means l for moving the' turret intermittently to present the work holders successively to 'the tool, each work holder involving a driving member, a driving member situated adjacent the turretk and into cooperation with which the driving member of each work holder is adapted to be brought as the work holder is presented in operative relation to the' tool, means for locking each work .holder against rotation, mechanism -for rendering said ait means inedective thereby to unlock the work holder ywhen its driving member is in cooperation with the second mentioned driving member, and means for drivlng the second mentioned member when the work holder is unlocked.

14. ln a machine of the character set forth, the combination of a turret, .work holders rotatably supported bythe turret, each work holder involving a driving member, a lock for securingeach work holder against rotation, a tool carrier, a tool adapted to be supported by the carrier and into operative relation with which' the successive work holders are adapted tobe brought. a Weight for impelling the tool carrier 7 a X direction to engage the tool with the Wo ,Y

means for retracting the tool carrier against the action of theweight, a driving member with which the driving members of the work holders are arranged to .cooperate when the work is in operative relation tr. the tool, and means for unlocking the work holder and for rotating the second mentioned driving member, said last mentioned driving member being voperative when the work is presented to the tool. y 4 15. ln a machine" of the character set forth, the combination of a turret, work holders rotatably supported by the turret. each work holder involving a driving membei', a lock for securing each Work holder .against rotation, a tool carrier, a tool adapted to be supported in various positions byk the carrier and into operative relation with which thes'uccessive work holders are adapted to be brought, a weight impelling thetool ,carrier toward the work, means foi-"rev tracting the tool carrier against the action of the weight, a driving member with which the driving members of the Work holders are adapted to cooperate when the Work lis in operative relationfto the tool, means for unlocking the work holder, and mechanism for rotating the second mentioned driving member when the workis presented to the tool.

16. ln a machine of the character set forth, the combination of a turret, work holders rotatably supported by the turret,

means for locking each Work holder against rotation, each Work holder involving a driving member, means for moving the turret in termittently to present the work holders successively at a given station, a tool situated at said station and with which the work is adapted to engage, a driving member situated at said station and arranged to mesh with the driving members of the work holders, a member carried by the turret and having operative connection with the lock of each Work holder, a cam with which said' member is adapted to cooperate and thereby be actuated to unlock the work holder, and means for operating the last mentioned driving member when a work holder oecupies the station 17. ln a machine of the character set forth, the combinationl of a frame, a turret supported thereby for rotation, work holders rotatably supported' b the turret, each work holder involving a riving member, a locking bolt for securing each work holder against rotation, an actuating member for withdrawing the bolt from locking position, a tool supportedby the frame-at a givenstation, `mechanism for intermittently moving the turret `to present the work holders successively to the tool, a driving member situated at said station and with which the driving member of each work.v holder is adapted to cooperate, a cam carried by the frame and wherewith the aforesaid actuating member is adapted to be engaged to`un1ock the corresponding work holder, antimeans for operating the last' mentioned driving member. when the driving member of the work holder is in cooperation therewith.-

18. In a machine of the character set forth, the combination of a trame, a turret supported thereby for rotation, work holders rotatably supported by theturret, each work holder involving a gear, bolt for securing each work holder against rotation, an actuating member for withdrawing each bolt from locking position,

tools supported by the frame "at stations spaced about the course of the turret, mechanism for intermittently moving the turret to present the work holders successively to the tools, a rackl situated between certain ones of, said stations andwithwhich the gears of the work holders are adapted to a locking.

mesh as' they are movedl past the rack, and

a 'cam carried by the frame and'wherewith each 'of the aforesaid actuating 'members is adapted to be engaged to unlock itserespec'- tive work holder when in the vicinity of the' rack.

19. In a Amachine of the character set forth, the combination'ofl a turret supported for rotation, work holders Yrotatably supported bythe turret, mea-ns for moving the turret to present the Work holders to af given station, means for rotating each work'holder when it occupies said station, a support sityuated at said station, a tool carrier vertical- \ly reciprocable within said support, means for clamping tools in various positions to said carrier, a weight applied to said carrier for impelling the tool carrier" toward thev work holder, adjustable means for limiting the movement of the toolcarrier toward the Work, a rocker arm pivota'lly supported 'intermediate its ends and having one of' its ends operatively connected tothe tool carrier, a-cam, a stirrup encircling the cam, and connectionsbetween the stirrup and the oppositel ende of the aforesaid rocker arm.

brake lshoe with the turret to retar arcanos 20. lln a machine ot the character set forth, the combination of a turret supported vfor rotation, work holders rotatably supported by the turret, tools situated at-various stations about the 'course of the turret, means for moving the turret to present the work holders successively tions, and means individual to certain of said stations for rotating the work holders.

21. in al machine of the character set forth, the combination of a turret, means for .moving the turret intermittently, a brake for arresting the movement of the turret, said brake comprising a shoe having a cavity, a plunger ided within said cavity, a spring for proJecting the plunger, the turret aving recesses for the reception of the plunger, and means for engagin tlie t e movementof the same before the plunger is brought into register with a recess ofthe turret.

22. ln Ia machine of the 'character set forth, the combination of a pair of tools disposed at right angles to each other, means or supporting a piece of work in a position to -be acted upon by said tools,y a cam in substantially theplane .of one of said tools for mo the same toward the work, a

Shaft ca v said cam, a second shaft disposed at .ri t angles to `the rst, driving connections tween said shafts, and connections between the second shaft-and the other 35111001 for controlling the latters movement.

23. In a machine of the character L.set forth, the combination of a work carrying turret, inner and outer opposed tools 4disposed at stations spaced apart, about the course of the turret, means for driving the tools, and an actuating member for moving the inner tool toward and into engagement with the workvand for moving the work outgvardly into engagement with the outer too 24. In a machine .o f the character set forth, the combination of an annular turret,

opposed tools situated at stations aboutthe course of the turret, work holders supported by -the 'turret for. movement r' ially thereof, means for moving the turret intermittently to. present the work holders t0 the successive stations, means for driving the tools, an` actuating member situated centrally of the and .means fordriving the actuating member, said member acting' to move the inner tools outwardly into con` tact with the work and for simultaneously the work holders outwardly to present the work tothe outer tools. p

25'. In a machine of 'the character set forth, the combination of an annulartur-4v ret, opposedl tools situated at stations about the course ofthe turret, work holders supat the several. sta-l ported by the turret for ovement radially thereof, means for moving the turret inter mittently to present the work holders tothe successive stations, means for driving the tools, that of certain of the tools being of variable speed, an.l actuating member situ ated centrally of the turret, and means iler` driving the actuating member, said menir acting to move the inner tools may into contact with the work and for shifting the work holders outwardly to present the of work, an actuating member for operating one tool, means for operating the other' tol, and driving mechanism having opera'- tive connection with said actuating member and said means.

27. lna machine of the characterA set i forth, the combination ofv an annular work carrying turret, horizontally disposed tools supported Ainside the turret and'in operative re ation to work carried thereby, vertically disposed tools supported in operative rela tion to the work, and means for actuating said tools.

28. ln a machineofthe character set 95 forth, the combination of a turret supported torotate in a horizontal plane, horizontally the course of the turret, means for actuat aid` tools, ,the horizontally ,dispod tools ein of ta turret, and means lfor moving wor supported by the turret transversely thereof dand vertically` disposed tools-situated about immovable in a direction transversel A intocontact with the last mentioned tools.v

29. In a machine of the character set forth, the combination of a turret support-- ed to rotate ina horizontal plane, groups of tools situated about the course of t e turret, the tools of certain of s'aid groups being an. Igularly disposed to each other.

L30. In 'a machine of the frame and into cooperation with whic they' haracter lset'` forth,- `the combination of a frame, a turret work holders. are brought by thev movement ofthe turret, and setsof tools about the course of the turret for operation upon the work, the tools of one set being disposed at anangle to each other'and arr .for

simultaneous operation u onth work.

In testimony whereof, hereunto ax my signature. 

